-/* GdkPixbuf library - JPEG image loader
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
+/* GdkPixbuf library - TIFF image loader
*
* Copyright (C) 1999 Mark Crichton
* Copyright (C) 1999 The Free Software Foundation
*
* Authors: Mark Crichton <crichton@gimp.org>
* Federico Mena-Quintero <federico@gimp.org>
+ * Jonathan Blandford <jrb@redhat.com>
+ * Søren Sandmann <sandmann@daimi.au.dk>
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
+ * You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
/* Following code (almost) blatantly ripped from Imlib */
#include <config.h>
-#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
#include <tiffio.h>
-#include "gdk-pixbuf.h"
+#include <errno.h>
+#include "gdk-pixbuf-private.h"
+#include "gdk-pixbuf-io.h"
+#ifdef G_OS_WIN32
+#include <fcntl.h>
+#define O_RDWR _O_RDWR
+#endif
\f
-/* Destroy notification function for the libart pixbuf */
+typedef struct _TiffContext TiffContext;
+struct _TiffContext
+{
+ GdkPixbufModulePreparedFunc prepare_func;
+ GdkPixbufModuleUpdatedFunc update_func;
+ gpointer user_data;
+
+ guchar *buffer;
+ guint allocated;
+ guint used;
+ guint pos;
+};
+
+\f
+
+/* There's no user data for the error handlers, so we just have to
+ * put a big-ass lock on the whole TIFF loader
+ */
+G_LOCK_DEFINE_STATIC (tiff_loader);
+static char *global_error = NULL;
+static TIFFErrorHandler orig_error_handler = NULL;
+static TIFFErrorHandler orig_warning_handler = NULL;
+
+static void
+tiff_warning_handler (const char *mod, const char *fmt, va_list ap)
+{
+ /* Don't print anything; we should not be dumping junk to
+ * stderr, since that may be bad for some apps.
+ */
+
+ /* libTIFF seems to occasionally warn about things that
+ * are really errors, so maybe we should just call tiff_error_handler
+ * here.
+ */
+}
+
+static void
+tiff_error_handler (const char *mod, const char *fmt, va_list ap)
+{
+ if (global_error) {
+ /* Blah, loader called us twice */
+ return;
+ }
+
+ global_error = g_strdup_vprintf (fmt, ap);
+}
+
+static void
+tiff_push_handlers (void)
+{
+ if (global_error)
+ g_warning ("TIFF loader left crufty global_error around, FIXME");
+
+ orig_error_handler = TIFFSetErrorHandler (tiff_error_handler);
+ orig_warning_handler = TIFFSetWarningHandler (tiff_warning_handler);
+}
+
+static void
+tiff_pop_handlers (void)
+{
+ if (global_error)
+ g_warning ("TIFF loader left crufty global_error around, FIXME");
+
+ TIFFSetErrorHandler (orig_error_handler);
+ TIFFSetWarningHandler (orig_warning_handler);
+}
+
+static void
+tiff_set_error (GError **error,
+ int error_code,
+ const char *msg)
+{
+ /* Take the error message from libtiff and merge it with
+ * some context we provide.
+ */
+ if (global_error) {
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ error_code,
+ "%s%s%s", msg, ": ", global_error);
+
+ g_free (global_error);
+ global_error = NULL;
+ }
+ else {
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ error_code, msg);
+ }
+}
+
+\f
+
+static void free_buffer (guchar *pixels, gpointer data)
+{
+ g_free (pixels);
+}
+
+static tileContigRoutine tiff_put_contig;
+static tileSeparateRoutine tiff_put_separate;
+
+/* We're lucky that TIFFRGBAImage uses the same RGBA packing
+ as gdk-pixbuf, thus we can simple reuse the default libtiff
+ put routines, only adjusting the coordinate system.
+ */
static void
-free_buffer (gpointer user_data, gpointer data)
-{
- free (data);
-}
-
-/* Shared library entry point */
-GdkPixbuf *
-image_load (FILE *f)
-{
- TIFF *tiff;
- guchar *pixels, *tmppix;
- gint w, h, x, y, num_pixs, fd;
- uint32 *rast, *tmp_rast;
-
- fd = fileno (f);
- tiff = TIFFFdOpen (fd, "libpixbuf-tiff", "r");
-
- if (!tiff)
- return NULL;
-
- TIFFGetField (tiff, TIFFTAG_IMAGEWIDTH, &w);
- TIFFGetField (tiff, TIFFTAG_IMAGELENGTH, &h);
- num_pixs = w * h;
-
- /* Yes, it needs to be _TIFFMalloc... */
- rast = (uint32 *) _TIFFmalloc (num_pixs * sizeof (uint32));
-
- if (!rast) {
- TIFFClose (tiff);
- return NULL;
- }
-
- if (TIFFReadRGBAImage (tiff, w, h, rast, 0)) {
- pixels = malloc (num_pixs * 4);
- if (!pixels) {
- _TIFFfree (rast);
- TIFFClose (tiff);
- return NULL;
- }
- tmppix = pixels;
-
- for (y = 0; y < h; y++) {
- /* Unexplainable...are tiffs backwards? */
- /* Also looking at the GIMP plugin, this
- * whole reading thing can be a bit more
- * robust.
- */
- tmp_rast = rast + ((h - y - 1) * w);
- for (x = 0; x < w; x++) {
- tmppix[0] = TIFFGetR (*tmp_rast);
- tmppix[1] = TIFFGetG (*tmp_rast);
- tmppix[2] = TIFFGetB (*tmp_rast);
- tmppix[3] = TIFFGetA (*tmp_rast);
- tmp_rast++;
- tmppix += 4;
- }
- }
- }
- _TIFFfree (rast);
- TIFFClose (tiff);
-
- return gdk_pixbuf_new_from_data (pixels, ART_PIX_RGB, TRUE,
- w, h, w * 4,
- free_buffer, NULL);
+put_contig (TIFFRGBAImage *img, uint32 *raster,
+ uint32 x, uint32 y, uint32 w, uint32 h,
+ int32 fromskew, int32 toskew, unsigned char *cp)
+{
+ uint32 *data = raster - y * img->width - x;
+
+ tiff_put_contig (img, data + img->width * (img->height - 1 - y) + x,
+ x, y, w, h, fromskew, -toskew - 2*(int32)w, cp);
+}
+
+static void
+put_separate (TIFFRGBAImage *img, uint32 *raster,
+ uint32 x, uint32 y, uint32 w, uint32 h,
+ int32 fromskew, int32 toskew,
+ unsigned char* r, unsigned char* g, unsigned char* b, unsigned char* a)
+{
+ uint32 *data = raster - y * img->width - x;
+
+ tiff_put_separate (img, data + img->width * (img->height - 1 - y) + x,
+ x, y, w, h, fromskew, -toskew - 2*w, r, g, b, a);
+}
+
+static GdkPixbuf *
+tiff_image_parse (TIFF *tiff, TiffContext *context, GError **error)
+{
+ guchar *pixels = NULL;
+ gint width, height, rowstride, bytes;
+ GdkPixbuf *pixbuf;
+ TIFFRGBAImage img;
+ gchar emsg[1024];
+
+ /* We're called with the lock held. */
+
+ g_return_val_if_fail (global_error == NULL, NULL);
+
+ if (!TIFFGetField (tiff, TIFFTAG_IMAGEWIDTH, &width) || global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Could not get image width (bad TIFF file)"));
+ return NULL;
+ }
+
+ if (!TIFFGetField (tiff, TIFFTAG_IMAGELENGTH, &height) || global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Could not get image height (bad TIFF file)"));
+ return NULL;
+ }
+
+ if (width <= 0 || height <= 0) {
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
+ _("Width or height of TIFF image is zero"));
+ return NULL;
+ }
+
+ rowstride = width * 4;
+ if (rowstride / 4 != width) { /* overflow */
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
+ _("Dimensions of TIFF image too large"));
+ return NULL;
+ }
+
+ bytes = height * rowstride;
+ if (bytes / rowstride != height) { /* overflow */
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
+ _("Dimensions of TIFF image too large"));
+ return NULL;
+ }
+
+ pixels = g_try_malloc (bytes);
+
+ if (!pixels) {
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
+ _("Insufficient memory to open TIFF file"));
+ return NULL;
+ }
+
+ pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8,
+ width, height, rowstride,
+ free_buffer, NULL);
+ if (!pixbuf) {
+ g_free (pixels);
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
+ _("Insufficient memory to open TIFF file"));
+ return NULL;
+ }
+
+ G_UNLOCK (tiff_loader);
+ if (context)
+ (* context->prepare_func) (pixbuf, NULL, context->user_data);
+ G_LOCK (tiff_loader);
+
+ if (!TIFFRGBAImageBegin (&img, tiff, 1, emsg) || global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Failed to load RGB data from TIFF file"));
+ g_object_unref (pixbuf);
+ return NULL;
+ }
+
+ if (img.put.any == NULL) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Unsupported TIFF variant"));
+ g_object_unref (pixbuf);
+ return NULL;
+ }
+
+ if (img.isContig) {
+ tiff_put_contig = img.put.contig;
+ img.put.contig = put_contig;
+ }
+ else {
+ tiff_put_separate = img.put.separate;
+ img.put.separate = put_separate;
+ }
+
+ TIFFRGBAImageGet (&img, (uint32 *)pixels, width, height);
+ TIFFRGBAImageEnd (&img);
+
+#ifdef WORDS_BIGENDIAN
+/* Turns out that the packing used by TIFFRGBAImage depends on the host byte order... */
+ while (pixels < pixbuf->pixels + bytes) {
+ uint32 pixel = *(uint32 *)pixels;
+ int r = TIFFGetR(pixel);
+ int g = TIFFGetG(pixel);
+ int b = TIFFGetB(pixel);
+ int a = TIFFGetA(pixel);
+ *pixels++ = r;
+ *pixels++ = g;
+ *pixels++ = b;
+ *pixels++ = a;
+ }
+#endif
+
+ G_UNLOCK (tiff_loader);
+ if (context)
+ (* context->update_func) (pixbuf, 0, 0, width, height, context->user_data);
+ G_LOCK (tiff_loader);
+
+ return pixbuf;
+}
+
+\f
+
+/* Static loader */
+
+static GdkPixbuf *
+gdk_pixbuf__tiff_image_load (FILE *f, GError **error)
+{
+ TIFF *tiff;
+ int fd;
+ GdkPixbuf *pixbuf;
+
+ g_return_val_if_fail (f != NULL, NULL);
+
+ G_LOCK (tiff_loader);
+
+ tiff_push_handlers ();
+
+ fd = fileno (f);
+
+ /* On OSF, apparently fseek() works in some on-demand way, so
+ * the fseek gdk_pixbuf_new_from_file() doesn't work here
+ * since we are using the raw file descriptor. So, we call lseek() on the fd
+ * before using it. (#60840)
+ */
+ lseek (fd, 0, SEEK_SET);
+ tiff = TIFFFdOpen (fd, "libpixbuf-tiff", "r");
+
+ if (!tiff || global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_CORRUPT_IMAGE,
+ _("Failed to open TIFF image"));
+ tiff_pop_handlers ();
+
+ G_UNLOCK (tiff_loader);
+ return NULL;
+ }
+
+ pixbuf = tiff_image_parse (tiff, NULL, error);
+
+ TIFFClose (tiff);
+ if (global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("TIFFClose operation failed"));
+ }
+
+ tiff_pop_handlers ();
+
+ G_UNLOCK (tiff_loader);
+
+ return pixbuf;
+}
+
+\f
+
+/* Progressive loader */
+
+static gpointer
+gdk_pixbuf__tiff_image_begin_load (GdkPixbufModuleSizeFunc size_func,
+ GdkPixbufModulePreparedFunc prepare_func,
+ GdkPixbufModuleUpdatedFunc update_func,
+ gpointer user_data,
+ GError **error)
+{
+ TiffContext *context;
+
+ context = g_new0 (TiffContext, 1);
+ context->prepare_func = prepare_func;
+ context->update_func = update_func;
+ context->user_data = user_data;
+ context->buffer = NULL;
+ context->allocated = 0;
+ context->used = 0;
+ context->pos = 0;
+
+ return context;
+}
+
+static tsize_t
+tiff_read (thandle_t handle, tdata_t buf, tsize_t size)
+{
+ TiffContext *context = (TiffContext *)handle;
+
+ if (context->pos + size > context->used)
+ return 0;
+
+ memcpy (buf, context->buffer + context->pos, size);
+ context->pos += size;
+ return size;
+}
+
+static tsize_t
+tiff_write (thandle_t handle, tdata_t buf, tsize_t size)
+{
+ return -1;
+}
+
+static toff_t
+tiff_seek (thandle_t handle, toff_t offset, int whence)
+{
+ TiffContext *context = (TiffContext *)handle;
+
+ switch (whence) {
+ case SEEK_SET:
+ if (offset > context->used || offset < 0)
+ return -1;
+ context->pos = offset;
+ break;
+ case SEEK_CUR:
+ if (offset + context->pos >= context->used)
+ return -1;
+ context->pos += offset;
+ break;
+ case SEEK_END:
+ if (offset + context->used > context->used)
+ return -1;
+ context->pos = context->used + offset;
+ break;
+ default:
+ return -1;
+ break;
+ }
+ return context->pos;
+}
+
+static int
+tiff_close (thandle_t context)
+{
+ return 0;
+}
+
+static toff_t
+tiff_size (thandle_t handle)
+{
+ TiffContext *context = (TiffContext *)handle;
+
+ return context->used;
+}
+
+static int
+tiff_map_file (thandle_t handle, tdata_t *buf, toff_t *size)
+{
+ TiffContext *context = (TiffContext *)handle;
+
+ *buf = context->buffer;
+ *size = context->used;
+
+ return 0;
+}
+
+static void
+tiff_unmap_file (thandle_t handle, tdata_t data, toff_t offset)
+{
+}
+
+static gboolean
+gdk_pixbuf__tiff_image_stop_load (gpointer data,
+ GError **error)
+{
+ TiffContext *context = data;
+ TIFF *tiff;
+ gboolean retval;
+
+ g_return_val_if_fail (data != NULL, FALSE);
+
+ G_LOCK (tiff_loader);
+
+ tiff_push_handlers ();
+
+ tiff = TIFFClientOpen ("libtiff-pixbuf", "r", data,
+ tiff_read, tiff_write,
+ tiff_seek, tiff_close,
+ tiff_size,
+ tiff_map_file, tiff_unmap_file);
+ if (!tiff || global_error) {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Failed to load TIFF image"));
+ retval = FALSE;
+ } else {
+ GdkPixbuf *pixbuf;
+
+ pixbuf = tiff_image_parse (tiff, context, error);
+ if (pixbuf)
+ g_object_unref (pixbuf);
+ retval = pixbuf != NULL;
+ if (global_error)
+ {
+ tiff_set_error (error,
+ GDK_PIXBUF_ERROR_FAILED,
+ _("Failed to load TIFF image"));
+ tiff_pop_handlers ();
+
+ retval = FALSE;
+ }
+ }
+
+ if (tiff)
+ TIFFClose (tiff);
+
+ g_assert (!global_error);
+
+ g_free (context->buffer);
+ g_free (context);
+
+ tiff_pop_handlers ();
+
+ G_UNLOCK (tiff_loader);
+
+ return retval;
+}
+
+static gboolean
+make_available_at_least (TiffContext *context, guint needed)
+{
+ guchar *new_buffer = NULL;
+ guint need_alloc;
+
+ need_alloc = context->used + needed;
+ if (need_alloc > context->allocated) {
+ guint new_size = 1;
+ while (new_size < need_alloc)
+ new_size *= 2;
+
+ new_buffer = g_try_realloc (context->buffer, new_size);
+ if (new_buffer) {
+ context->buffer = new_buffer;
+ context->allocated = new_size;
+ return TRUE;
+ }
+ return FALSE;
+ }
+ return TRUE;
+}
+
+static gboolean
+gdk_pixbuf__tiff_image_load_increment (gpointer data, const guchar *buf,
+ guint size, GError **error)
+{
+ TiffContext *context = (TiffContext *) data;
+
+ g_return_val_if_fail (data != NULL, FALSE);
+
+ if (!make_available_at_least (context, size)) {
+ g_set_error (error,
+ GDK_PIXBUF_ERROR,
+ GDK_PIXBUF_ERROR_INSUFFICIENT_MEMORY,
+ _("Insufficient memory to open TIFF file"));
+ return FALSE;
+ }
+
+ memcpy (context->buffer + context->used, buf, size);
+ context->used += size;
+ return TRUE;
+}
+
+void
+MODULE_ENTRY (tiff, fill_vtable) (GdkPixbufModule *module)
+{
+ module->load = gdk_pixbuf__tiff_image_load;
+ module->begin_load = gdk_pixbuf__tiff_image_begin_load;
+ module->stop_load = gdk_pixbuf__tiff_image_stop_load;
+ module->load_increment = gdk_pixbuf__tiff_image_load_increment;
+}
+
+void
+MODULE_ENTRY (tiff, fill_info) (GdkPixbufFormat *info)
+{
+ static GdkPixbufModulePattern signature[] = {
+ { "MM \x2a", " z ", 100 },
+ { "II\x2a ", " z", 100 },
+ { NULL, NULL, 0 }
+ };
+ static gchar * mime_types[] = {
+ "image/tiff",
+ NULL
+ };
+ static gchar * extensions[] = {
+ "tiff",
+ "tif",
+ NULL
+ };
+
+ info->name = "tiff";
+ info->signature = signature;
+ info->description = N_("The TIFF image format");
+ info->mime_types = mime_types;
+ info->extensions = extensions;
+ info->flags = 0;
}
projects / ~andy / gtk / blobdiff